Table 6.57—DRM_Colour_Index_Control_Link
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Property |
Description |
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Superclass |
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Class |
· <DRM Colour Index Control Link> |
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Subclass |
· none |
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Definition |
The specialized <DRM Control Link> used to provide the connection between an ordered aggregation of <DRM Expression>s and the target fields of a <DRM Colour Index>. The color_index field is 1-based index into the ordered aggregation of <DRM Expression>s, and is used to select the specific <DRM Expression>s that defines <DRM Colour Index>’s index field. The intensity_level_index field is a 1-based index into the ordered aggregation of <DRM Expression>s, and is used to select the specific <DRM Expression>s that defines <DRM Colour Index>’s intensity_level field. |
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Example(s) |
· Consider a <DRM Geometry Model> within a <DRM Model> representing a tree, where the geometry consists of a single <DRM Polygon> defined with <DRM Stamp Behaviour>.
The <DRM Polygon>'s appearance is determined by a <DRM Colour Index> and an <DRM Image Mapping Function>. However, for every <DRM Geometry Model Instance> of this tree, the data provider wants to be able to vary the intensity_level of the <DRM Colour Index>, so that its contribution to the overall color of the tree changes from instance to instance. Consequently, the <DRM Colour Index> has a <DRM Colour Index Control Link>, which specifies a <DRM Variable> that controls the intensity_level of the <DRM Colour Index>, so that each <DRM Geometry Model Instance> can supply its own <DRM Literal> to determine the percent contribution of the <DRM Colour Index> to the appearance of the <DRM Polygon>. |
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Inherited field elements |
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Field elements |
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Associated to (one-way) (inherited) |
· none |
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Associated to (one-way) |
· none |
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Associated by (one-way) (inherited) |
· none |
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Associated by (one-way) |
· none |
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Associated with (two-way) (inherited) |
· none |
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Associated with (two-way) |
· none |
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Composed of (two-way) (inherited) |
· one or more {ordered} <DRM Expression>s |
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Composed of (two-way) |
· none |
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Composed of (two-way metadata) (inherited) |
· none |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
· none |
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Component of (two-way) |
· one or more <DRM Colour Index>s |
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Constraints |
· none |
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Notes |
1 A text description for what the <DRM Control Link> is. 2 Index of the expression defining the <DRM Colour Index>’s index field. Zero means that the <DRM Colour Index>’s index field is not controlled. 3 Index of the expression defining the <DRM Colour Index>’s intensity level field. Zero means that the <DRM Colour Index>’s intensity level field is not controlled. |
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Class diagram |
